primary xylem

Listing 1 - 10 from 37 for primary xylem

Lab I - Plant Structure (3)
... often crushed or destroyed chemically during preservation), it is the structure of the xylem --particularly primary xylem-- that is of particular interest for paleobotany. Understanding stele types is ... character of stelar development is the maturation of the primary xylem. The earliest maturing xylem cells are called protoxylem. These xylem elements are generally small and narrow. Later maturing ...
www.ucmp.berkeley.edu

Lab VIII - Medullosans and Cycads (2)
... surrounding different bundles of the eustele rather than surrounding the entire collection of primary xylem as in angiosperms. Medullosa stems have a thick, sclerenchymous cortex with abundant secretory ... differs from Medullosa in having fewer vascular bundles, less well developed wood, and larger primary xylem. The leaf traces also have different structure. Foliage of Medullosa (here referring to ...
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Plant Pathology Glossary
... Inoculum inoculum produced by infections that took place during the same growing season. Compare with primary inoculum. Secondary Metabolite a compound that is not necessary for growth or maintenance of cellular ... W X Xylem a complex vascular tissue through which water and minerals are conducted through the plant. Xylem also aids in the structural support of a plant as the primary component of its ...
bugs.bio.usyd.edu.au

Angiosperm Families - Implicit Attributes
... absent. Medullary bundles absent. Internal phloem absent. The secondary phloem not stratified. Xylem without tracheids; without fibre tracheids; without libriform fibres; with vessels. Tile ... . Embryo well differentiated. Testa without phytomelan. Micropyle not zigzag. Seedling. Coleoptile absent. Primary root persistent. Physiology, biochemistry. Nitrogen-fixing root nodules absent. Mustard-oils ...
delta-intkey.com

Angiosperm Families - Acanthaceae Juss.
... anatomy. Cork cambium present; initially deep-seated (sometimes), or superficial. Nodes unilacunar. Primary vascular tissue bicollateral, or centrifugal. Cortical bundles absent. Medullary bundles present (rarely), ... ‘Included’ phloem absent. Xylem with fibre tracheids; with libriform fibres; with vessels. Vessel end-walls simple. Vessels without vestured pits. Primary medullary rays narrow. Wood ...
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Citrus Diseases Exotic to Florida: Citrus Variegated Chlorosis (CVC)
... causal agent of CVC is vectored by sharpshooter leafhoppers ( Figure 1 ). Sharpshooters feed on plant xylem (Xylem conducts water within the plant) and acquire the CVC causal agent during feeding, and then ... able to quickly detect any infections that may occur. Budwood certification and exclusion are the primary strategies to prevent the introduction of CVC to new areas that are not yet affected ...
edis.ifas.ufl.edu

EXTOXNET PIP - CLOMAZONE
... funding was provided by the USDA/Extension Service/National Agricultural Pesticide Impact Assessment Program. EXTOXNET primary files maintained and archived at Oregon State University Revised June 1996 Clomazone Trade and Other ... through the roots from the soil and by shoots. It is then translocated in the xylem and diffuses within leaves. It does not move downward in plants or from leaf to ...
extoxnet.orst.edu

Physiology Of Drought In Stressed Plants
... , water is drawn through many thousands of cells called xylem vessels. Xylem cells can be thought of as bottomless barrels stacked end ... the leaves. If we think of water molecules in this xylem pipeline being like links in a chain, each time one link ... close its stomates and stop photosynthesis. Since photosynthesis is the primary means by which plants generate their food supply, frequent stoppages ...
gardenline.usask.ca

Tree Physiology, Volume 26, 2006: Contents
... 556 [ Summary ] [ Full Text ] Six new cellulose synthase genes from Eucalyptus are associated with primary and secondary cell wall biosynthesis Martin Ranik and Alexander A. Myburg Tree Physiology 26 ... Carrie D. Pendley Tree Physiology 26:605–611 [ Summary ] [ Full Text ] Monolignol oxidation by xylem peroxidase isoforms of Norway spruce (Picea abies) and silver birch (Betula pendula) Kaisa Marjamaa, ...
heronpublishing.com

Vegetable Crops - pt 6
... organism is seedborne and can remain in the soil and diseased plants for some time. Primary infection, however, is mostly from infected seed. Control can be obtained by using disease-free ... brown discoloration of the water conducting vessels. The fungus is soilborne, passes upward into the xylem of the stem. Blocking of the water-conducting vessels is the main reason for wilting ...
plantpathology.tamu.edu

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